Here is another mode j option: http://www.dk3wn.info/j-filter.shtml 73 Jan PE0SAT On 11-11-2012 09:49, Nick Pugh wrote: > Hi All > > > > A few weeks back there was a note on a mode j filter made from square > tube > can someone on the list point me to the article > -- With regards PE0SAT Internet web-page http://www.pe0sat.vgnet.nl/